https://bugs.freedesktop.org/show_bug.cgi?id=59614

Priority: medium Bug ID: 59614 Assignee: dri-devel@lists.freedesktop.org Summary: [bisected] Black screen on boot with Radeon HD 6670 Severity: normal Classification: Unclassified OS: Linux (All) Reporter: markus.ka.rinne@gmail.com Hardware: x86 (IA32) Status: NEW Version: unspecified Component: DRM/Radeon Product: DRI

At boot, the screen goes blank. This happens at the moment when the screen would normally change from VGA text console to framebuffer text console. I can't make an ssh connection to the box after screen goes blank.

Motherboard: MSI K9AGM3 Video card: Radeon HD 6670

lspci -vvv gives:

01:00.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI Turks [Radeon HD 6670] (prog-if 00 [VGA controller]) Subsystem: ASUSTeK Computer Inc. Device 03e0 Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx+ Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Latency: 0, Cache Line Size: 64 bytes Interrupt: pin A routed to IRQ 43 Region 0: Memory at d0000000 (64-bit, prefetchable) [size=256M] Region 2: Memory at fe9e0000 (64-bit, non-prefetchable) [size=128K] Region 4: I/O ports at c000 [size=256] Expansion ROM at fe9c0000 [disabled] [size=128K] Capabilities: <access denied> Kernel driver in use: radeon

I bisected this. The first bad commit is: 0ecebb9e0d14e9948e0b1529883a776758117d6f drm/radeon: switch to a finer grained reset for evergreen

Reverting this commit on top of v3.8-rc4 results in a working system.